Search Results for author: Dipankar Das

Found 80 papers, 5 papers with code

WME 3.0: An Enhanced and Validated Lexicon of Medical Concepts

no code implementations GWC 2018 Anupam Mondal, Dipankar Das, Erik Cambria, Sivaji Bandyopadhyay

Information extraction in the medical domain is laborious and time-consuming due to the insufficient number of domain-specific lexicons and lack of involvement of domain experts such as doctors and medical practitioners.

Descriptive

Classification of COVID19 tweets using Machine Learning Approaches

no code implementations NAACL (SMM4H) 2021 Anupam Mondal, Sainik Mahata, Monalisa Dey, Dipankar Das

The steps for pre-processing tweets, feature extraction, and the development of the machine learning models, are described extensively in the documentation.

BIG-bench Machine Learning Classification

JUNLP@ICON2020: Low Resourced Machine Translation for Indic Languages

no code implementations ICON 2020 Sainik Mahata, Dipankar Das, Sivaji Bandyopadhyay

In the current work, we present the description of the systems submitted to a machine translation shared task organized by ICON 2020: 17th International Conference on Natural Language Processing.

Machine Translation Translation

WME: Sense, Polarity and Affinity based Concept Resource for Medical Events

no code implementations GWC 2016 Anupam Mondal, Dipankar Das, Erik Cambria, Sivaji Bandyopadhyay

In order to overcome the lack of medical corpora, we have developed a WordNet for Medical Events (WME) for identifying medical terms and their sense related information using a seed list.

POS Relation

Leveraging Expectation Maximization for Identifying Claims in Low Resource Indian Languages

no code implementations ICON 2021 Rudra Dhar, Dipankar Das

Furthermore, we used different ratios of manually labeled data and weakly labeled data to train our various machine learning models.

A Model of Competitive Assortment Planning Algorithm

no code implementations16 Jul 2023 Dipankar Das

The current paper suggests a model and discusses how competition and collusion arise in the digital marketplace through assortment planning or assortment optimization algorithm.

Complementarity in Demand-side Variables and Educational Participation

no code implementations20 Feb 2023 Anjan Ray Chaudhury, Dipankar Das, Sreemanta Sarkar

Decision to participate in education depends on the circumstances individual inherits and on the returns to education she expects as well.

Measurement of Trustworthiness of the Online Reviews

no code implementations3 Oct 2022 Dipankar Das

In this article, the researcher aims at formally deriving a rationality pattern function and thereby, the degree of rationality of the decision-maker or the reviewer in the sequential choice problem in the e-commerce markets.

Decision Making

JU_NLP at HinglishEval: Quality Evaluation of the Low-Resource Code-Mixed Hinglish Text

no code implementations16 Jun 2022 Prantik Guha, Rudra Dhar, Dipankar Das

In this paper we describe a system submitted to the INLG 2022 Generation Challenge (GenChal) on Quality Evaluation of the Low-Resource Synthetically Generated Code-Mixed Hinglish Text.

Word Embeddings

Can Unsupervised Knowledge Transfer from Social Discussions Help Argument Mining?

1 code implementation ACL 2022 Subhabrata Dutta, Jeevesh Juneja, Dipankar Das, Tanmoy Chakraborty

Identifying argument components from unstructured texts and predicting the relationships expressed among them are two primary steps of argument mining.

Argument Mining Language Modelling +2

Incomplete Gamma Integrals for Deep Cascade Prediction using Content, Network, and Exogenous Signals

1 code implementation13 Jun 2021 Subhabrata Dutta, Shravika Mittal, Dipankar Das, Soumen Chakrabarti, Tanmoy Chakraborty

Second, there is a measurable positive correlation between the novelty of the root content (with respect to a streaming external corpus) and the relative size of the resulting cascade.

JUNLP at SemEval-2020 Task 9: Sentiment Analysis of Hindi-English Code Mixed Data Using Grid Search Cross Validation

no code implementations SEMEVAL 2020 Avishek Garain, Sainik Mahata, Dipankar Das

This linguistic phenomenon poses a great challenge to conventional NLP domains such as Sentiment Analysis, Machine Translation, and Text Summarization, to name a few.

Machine Translation Sentiment Analysis +2

JUNLP@Dravidian-CodeMix-FIRE2020: Sentiment Classification of Code-Mixed Tweets using Bi-Directional RNN and Language Tags

1 code implementation20 Oct 2020 Sainik Kumar Mahata, Dipankar Das, Sivaji Bandyopadhyay

Sentiment analysis has been an active area of research in the past two decades and recently, with the advent of social media, there has been an increasing demand for sentiment analysis on social media texts.

Sentiment Analysis Sentiment Classification

Development of POS tagger for English-Bengali Code-Mixed data

no code implementations ICON 2019 Tathagata Raha, Sainik Kumar Mahata, Dipankar Das, Sivaji Bandyopadhyay

The proposed system is a modular approach that starts by tagging individual tokens with their respective languages and then passes them to different POS taggers, designed for different languages (English and Bengali, in our case).

POS Sentence +1

Preparation of Sentiment tagged Parallel Corpus and Testing its effect on Machine Translation

no code implementations28 Jul 2020 Sainik Kumar Mahata, Amrita Chandra, Dipankar Das, Sivaji Bandyopadhyay

The preparation of raw parallel corpus, sentiment analysis of the sentences and the training of a Character Based Neural Machine Translation model using the same has been discussed extensively in this paper.

Machine Translation Sentiment Analysis +1

JUNLP@SemEval-2020 Task 9:Sentiment Analysis of Hindi-English code mixed data using Grid Search Cross Validation

no code implementations24 Jul 2020 Avishek Garain, Sainik Kumar Mahata, Dipankar Das

This linguistic phenomenon poses a great challenge to conventional NLP domains such as Sentiment Analysis, Machine Translation, and Text Summarization, to name a few.

Machine Translation Sentiment Analysis +2

Investigating Deep Learning Approaches for Hate Speech Detection in Social Media

no code implementations29 May 2020 Prashant Kapil, Asif Ekbal, Dipankar Das

Moreover, the varieties in user-generated data and the presence of various forms of hate speech makes it very challenging to identify the degree and intention of the message.

Hate Speech Detection

Code-Mixed to Monolingual Translation Framework

no code implementations9 Nov 2019 Sainik Kumar Mahata, Soumil Mandal, Dipankar Das, Sivaji Bandyopadhyay

The use of multilingualism in the new generation is widespread in the form of code-mixed data on social media, and therefore a robust translation system is required for catering to the monolingual users, as well as for easier comprehension by language processing models.

Language Modelling Translation +1

K-TanH: Efficient TanH For Deep Learning

no code implementations17 Sep 2019 Abhisek Kundu, Alex Heinecke, Dhiraj Kalamkar, Sudarshan Srinivasan, Eric C. Qin, Naveen K. Mellempudi, Dipankar Das, Kunal Banerjee, Bharat Kaul, Pradeep Dubey

We propose K-TanH, a novel, highly accurate, hardware efficient approximation of popular activation function TanH for Deep Learning.

Translation

Modeling Engagement Dynamics of Online Discussions using Relativistic Gravitational Theory

no code implementations10 Aug 2019 Subhabrata Dutta, Dipankar Das, Tanmoy Chakraborty

Unlike previous studies which model a discussion in a static manner, in the present study, we model it as a time-varying process and solve two inter-related problems -- predict which user groups will get engaged with an ongoing discussion, and forecast the growth rate of a discussion in terms of the number of comments.

NLP at SemEval-2019 Task 6: Detecting Offensive language using Neural Networks

no code implementations SEMEVAL 2019 Prashant Kapil, Asif Ekbal, Dipankar Das

The three best models that performed best on individual sub tasks are stacking of CNN-Bi-LSTM with Attention, BiLSTM with POS information added with word features and Bi-LSTM for third task.

POS

Mixed Precision Training With 8-bit Floating Point

no code implementations29 May 2019 Naveen Mellempudi, Sudarshan Srinivasan, Dipankar Das, Bharat Kaul

Reduced precision computation for deep neural networks is one of the key areas addressing the widening compute gap driven by an exponential growth in model size.

Quantization

SMT vs NMT: A Comparison over Hindi & Bengali Simple Sentences

no code implementations12 Dec 2018 Sainik Kumar Mahata, Soumil Mandal, Dipankar Das, Sivaji Bandyopadhyay

All of the systems use English-Hindi and English-Bengali language pairs containing simple sentences as well as sentences of other complexity.

Machine Translation NMT +2

How did the discussion go: Discourse act classification in social media conversations

no code implementations7 Aug 2018 Subhabrata Dutta, Tanmoy Chakraborty, Dipankar Das

Our proposed model outperformed the previous one in terms of domain independence; without using platform-dependent structural features, our hierarchical LSTM with word relevance attention mechanism achieved F1-scores of 71\% and 66\% respectively to predict discourse roles of comments in Reddit and Facebook discussions.

General Classification Sentence +1

Sentiment Analysis of Code-Mixed Indian Languages: An Overview of SAIL_Code-Mixed Shared Task @ICON-2017

no code implementations18 Mar 2018 Braja Gopal Patra, Dipankar Das, Amitava Das

This paper presents overview of the shared task on sentiment analysis of code-mixed data pairs of Hindi-English and Bengali-English collected from the different social media platform.

Sentiment Analysis Stance Detection

Preparing Bengali-English Code-Mixed Corpus for Sentiment Analysis of Indian Languages

no code implementations11 Mar 2018 Soumil Mandal, Sainik Kumar Mahata, Dipankar Das

To gather attention and encourage researchers to work on this crisis, we prepared gold standard Bengali-English code-mixed data with language and polarity tag for sentiment analysis purposes.

Sentiment Analysis TAG

Language Identification of Bengali-English Code-Mixed data using Character & Phonetic based LSTM Models

no code implementations10 Mar 2018 Soumil Mandal, Sourya Dipta Das, Dipankar Das

Language identification of social media text still remains a challenging task due to properties like code-mixing and inconsistent phonetic transliterations.

Language Identification

On Scale-out Deep Learning Training for Cloud and HPC

no code implementations24 Jan 2018 Srinivas Sridharan, Karthikeyan Vaidyanathan, Dhiraj Kalamkar, Dipankar Das, Mikhail E. Smorkalov, Mikhail Shiryaev, Dheevatsa Mudigere, Naveen Mellempudi, Sasikanth Avancha, Bharat Kaul, Pradeep Dubey

The exponential growth in use of large deep neural networks has accelerated the need for training these deep neural networks in hours or even minutes.

Philosophy

Analyzing Roles of Classifiers and Code-Mixed factors for Sentiment Identification

no code implementations8 Jan 2018 Soumil Mandal, Dipankar Das

We have also tested various models trained on code-mixed data, as well as English features and the highest accuracy of 72. 50% was obtained by a Support Vector Machine (SVM) model.

NITMZ-JU at IJCNLP-2017 Task 4: Customer Feedback Analysis

no code implementations IJCNLP 2017 Somnath Banerjee, Partha Pakray, Riyanka Manna, Dipankar Das, Alex Gelbukh, er

In this paper, we describe a deep learning framework for analyzing the customer feedback as part of our participation in the shared task on Customer Feedback Analysis at the 8th International Joint Conference on Natural Language Processing (IJCNLP 2017).

Text Classification

JUNLP at IJCNLP-2017 Task 3: A Rank Prediction Model for Review Opinion Diversification

no code implementations IJCNLP 2017 Monalisa Dey, Anupam Mondal, Dipankar Das

IJCNLP-17 Review Opinion Diversification (RevOpiD-2017) task has been designed for ranking the top-k reviews of a product from a set of reviews, which assists in identifying a summarized output to express the opinion of the entire review set.

Identification of Character Adjectives from Mahabharata

no code implementations RANLP 2017 Apurba Paul, Dipankar Das

along with deep learning to classify the patterns as characters or non-characters in order to achieve decent accuracy.

BUCC2017: A Hybrid Approach for Identifying Parallel Sentences in Comparable Corpora

no code implementations WS 2017 Sainik Mahata, Dipankar Das, B, Sivaji yopadhyay

A Statistical Machine Translation (SMT) system is always trained using large parallel corpus to produce effective translation.

Machine Translation Sentence +1

RAIL: Risk-Averse Imitation Learning

1 code implementation20 Jul 2017 Anirban Santara, Abhishek Naik, Balaraman Ravindran, Dipankar Das, Dheevatsa Mudigere, Sasikanth Avancha, Bharat Kaul

Generative Adversarial Imitation Learning (GAIL) is a state-of-the-art algorithm for learning policies when the expert's behavior is available as a fixed set of trajectories.

Autonomous Driving Continuous Control +1

Ternary Residual Networks

no code implementations15 Jul 2017 Abhisek Kundu, Kunal Banerjee, Naveen Mellempudi, Dheevatsa Mudigere, Dipankar Das, Bharat Kaul, Pradeep Dubey

Aided by such an elegant trade-off between accuracy and compute, the 8-2 model (8-bit activations, ternary weights), enhanced by ternary residual edges, turns out to be sophisticated enough to achieve very high accuracy ($\sim 1\%$ drop from our FP-32 baseline), despite $\sim 1. 6\times$ reduction in model size, $\sim 26\times$ reduction in number of multiplications, and potentially $\sim 2\times$ power-performance gain comparing to 8-8 representation, on the state-of-the-art deep network ResNet-101 pre-trained on ImageNet dataset.

Complexity Metric for Code-Mixed Social Media Text

no code implementations4 Jul 2017 Souvick Ghosh, Satanu Ghosh, Dipankar Das

Also, the index can be applied to a sentence and seamlessly extended to a paragraph or an entire document.

Sentence

Sentiment Identification in Code-Mixed Social Media Text

no code implementations4 Jul 2017 Souvick Ghosh, Satanu Ghosh, Dipankar Das

While some tasks deal with identifying the presence of sentiment in the text (Subjectivity analysis), other tasks aim at determining the polarity of the text categorizing them as positive, negative and neutral.

Sentiment Analysis Subjectivity Analysis

Ternary Neural Networks with Fine-Grained Quantization

no code implementations2 May 2017 Naveen Mellempudi, Abhisek Kundu, Dheevatsa Mudigere, Dipankar Das, Bharat Kaul, Pradeep Dubey

We address this by fine-tuning Resnet-50 with 8-bit activations and ternary weights at $N=64$, improving the Top-1 accuracy to within $4\%$ of the full precision result with $<30\%$ additional training overhead.

Quantization

Mixed Low-precision Deep Learning Inference using Dynamic Fixed Point

no code implementations31 Jan 2017 Naveen Mellempudi, Abhisek Kundu, Dipankar Das, Dheevatsa Mudigere, Bharat Kaul

We propose a cluster-based quantization method to convert pre-trained full precision weights into ternary weights with minimal impact on the accuracy.

Quantization

Multimodal Mood Classification - A Case Study of Differences in Hindi and Western Songs

no code implementations COLING 2016 Braja Gopal Patra, Dipankar Das, B, Sivaji yopadhyay

Finally, we developed mood classification systems using Support Vector Machines and Feed Forward Neural Networks based on the features collected from audio, lyrics, and a combination of both.

Classification feature selection +4

Authorship Verification - An Approach based on Random Forest

no code implementations29 Jul 2016 Promita Maitra, Souvick Ghosh, Dipankar Das

We have used several word-based and style-based features to identify the dif-ferences between the known and unknown problems of one given set and label the unknown ones accordingly using a Random Forest based classifier.

Authorship Attribution Authorship Verification +2

Distributed Deep Learning Using Synchronous Stochastic Gradient Descent

no code implementations22 Feb 2016 Dipankar Das, Sasikanth Avancha, Dheevatsa Mudigere, Karthikeyan Vaidynathan, Srinivas Sridharan, Dhiraj Kalamkar, Bharat Kaul, Pradeep Dubey

We design and implement a distributed multinode synchronous SGD algorithm, without altering hyper parameters, or compressing data, or altering algorithmic behavior.

Identifying Bengali Multiword Expressions using Semantic Clustering

no code implementations23 Jan 2014 Tanmoy Chakraborty, Dipankar Das, Sivaji Bandyopadhyay

As a by-product of this experiment, we have started developing a standard lexicon in Bengali that serves as a productive Bengali linguistic thesaurus.

Clustering Natural Language Understanding

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